In need a short answer about cancer and the pahse

Explanation: okay so cells have this mechanism to kill themselves if a bad mutation happens but when that breaks and the cell can longer do that it is considered a cancer cell the cell will continue to mutated and multiply if mutated enough it will be able to hide itself with regular cells, from the  immune system after a long time it will get veins to give all the nutrition to the cancer cells making it grow more if lucky it will multiply and mutated  but this mutations makes it think its a regular cell creating a cancer tumor

now cancer is beating cancer. eventually it will take over but you will have god cancer  

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.